Complete Next.js migration with SSR and Docker deployment

- Migrate from vanilla JavaScript SPA to Next.js 16 with App Router
- Add server-side rendering for all pages (Home, Compare, Rankings)
- Create individual school pages with dynamic routing (/school/[urn])
- Implement Chart.js and Leaflet map integrations
- Add comprehensive SEO with sitemap, robots.txt, and JSON-LD
- Set up Docker multi-service architecture (PostgreSQL, FastAPI, Next.js)
- Update CI/CD pipeline to build both backend and frontend images
- Fix Dockerfile to include devDependencies for TypeScript compilation
- Add Jest testing configuration
- Implement performance optimizations (code splitting, caching)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

nextjs-app/components/Navigation.module.css

@@ -0,0 +1,103 @@
+.header {
+  position: sticky;
+  top: 0;
+  z-index: 100;
+  background: white;
+  border-bottom: 1px solid #e5e7eb;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
+}
+
+.container {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 0 1.5rem;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  height: 64px;
+}
+
+.logo {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  text-decoration: none;
+  color: #1f2937;
+  font-size: 1.25rem;
+  font-weight: 700;
+  transition: color 0.2s ease;
+}
+
+.logo:hover {
+  color: #3b82f6;
+}
+
+.logoIcon {
+  font-size: 1.5rem;
+}
+
+.logoText {
+  font-weight: 700;
+}
+
+.nav {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.navLink {
+  position: relative;
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.625rem 1rem;
+  font-size: 0.9375rem;
+  font-weight: 500;
+  color: #6b7280;
+  text-decoration: none;
+  border-radius: 6px;
+  transition: all 0.2s ease;
+}
+
+.navLink:hover {
+  color: #1f2937;
+  background: #f3f4f6;
+}
+
+.navLink.active {
+  color: #3b82f6;
+  background: #eff6ff;
+}
+
+.badge {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-width: 1.25rem;
+  height: 1.25rem;
+  padding: 0 0.375rem;
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: white;
+  background: #3b82f6;
+  border-radius: 9999px;
+}
+
+@media (max-width: 640px) {
+  .container {
+    padding: 0 1rem;
+  }
+
+  .logoText {
+    display: none;
+  }
+
+  .nav {
+    gap: 0.25rem;
+  }
+
+  .navLink {
+    padding: 0.5rem 0.75rem;
+    font-size: 0.875rem;
+  }
+}